Global Patent Index - EP 0847025 A3

EP 0847025 A3 2000-06-14 - Information recording and updating method, information recording and updating apparatus, recording medium, initializing apparatus and recording medium

Title (en)

Information recording and updating method, information recording and updating apparatus, recording medium, initializing apparatus and recording medium

Title (de)

Verfahren und Vorrichtung zum Registrieren und Aktualisieren von Daten, Registriermittel, Initialisierungsvorrichtung und Registriermittel

Title (fr)

Méthode et dispositif pour l'enregistrement et la mise à jour de données; moyen d'enregistrement, dispositif d'initialisation et moyen d'enregistrement

Publication

EP 0847025 A3 (EN)

Application

EP 97309451 A

Priority

JP 34466396 A

Abstract (en)

[origin: EP0847025A2] When an information signal recorded in a magnetic card is updated by an information recording and updating apparatus, a spectrum spread signal corresponding to the updated information signal is generated and it is then recorded superimposing to the information recorded previously in the magnetic card without erasing the old information. Since the information is spectrum spread, alternation is difficult. Moreover, the magnetic card may be discriminated whether it may be used or not by considering the old information recorded in the magnetic card when it is used. <IMAGE>

IPC 1-7 (main, further and additional classification)

G06K 19/12; G07F 7/12

IPC 8 full level (invention and additional information)

G11B 20/10 (2006.01); G06F 21/24 (2006.01); G06K 19/12 (2006.01); G07F 7/02 (2006.01); G07F 7/08 (2006.01)

CPC (invention and additional information)

G07F 7/02 (2013.01); G06K 19/12 (2013.01); G06Q 20/3437 (2013.01); G07F 7/086 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 0847025 A2 19980610; EP 0847025 A3 20000614; EP 0847025 B1 20040519; CN 1099664 C 20030122; CN 1184999 A 19980617; DE 69729165 D1 20040624; DE 69729165 T2 20050525; JP H10172235 A 19980626; US 6101051 A 20000808

INPADOC legal status


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